9966025 has 12 divisors (see below), whose sum is σ = 12411904. Its totient is φ = 7938000.

The previous prime is 9966023. The next prime is 9966037. The reversal of 9966025 is 5206699.

It is a happy number.

It is not a de Polignac number, because 9966025 - 2¹ = 9966023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9966023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6040 + ... + 7510.

Almost surely, 2^9966025 is an apocalyptic number.

It is an amenable number.

9966025 is a deficient number, since it is larger than the sum of its proper divisors (2445879).

9966025 is a wasteful number, since it uses less digits than its factorization.

9966025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1752 (or 1747 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 9966025 is about 3156.9011704518. The cubic root of 9966025 is about 215.1992024334.

It can be divided in two parts, 996 and 6025, that added together give a triangular number (7021 = T₁₁₈).

The spelling of 9966025 in words is "nine million, nine hundred sixty-six thousand, twenty-five".